v3.26.1
RELATED PARTY TRANSACTIONS - Accounts payable to affiliated corporations (Details) - CAD ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
RELATED PARTY TRANSACTIONS    
Total payables $ 85.4 $ 69.3
Ultimate parent and parent corporation    
RELATED PARTY TRANSACTIONS    
Accounts payable 17.6 42.0
Interest payable   4.7
Corporations under common control    
RELATED PARTY TRANSACTIONS    
Accounts payable $ 67.8 $ 22.6